Both graywater and nutrient rich liquids or stabilized solids from primary treatment processes can be used as feedstock in fish and/or water plant farming.

Treatment Level:  Secondary 
Relative Cost:
  medium – high
Amount of Maintenance Interaction:  medium – high
Beneficial Byproduct:  lots (fish and/or plants)



Operation & Maintenance

Additional Notes:

  • Aquaculture fish and plants should not be eaten raw.
  • Kitchen processes must be adjusted, such as using separate gutting and cutting knives, to avoid cross-contamination of fish flesh.
  • Good practice is to keep fish in clean water ponds (or eliminate waste feed to ponds) for several weeks at the end of their growing cycle.

Salmon Aquaculture Project (

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